package com.charjay.queue;


import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class CyclicBarrierTest {

	public static void main(String[] args) {
		ExecutorService service = Executors.newCachedThreadPool(); // 线程池
		final CyclicBarrier cb = new CyclicBarrier(3);
		for (int i = 0; i < 3; i++) {
			Runnable runnable = new Runnable() {
				public void run() {
					try {
						Thread.sleep((long) (Math.random() * 10000));
						System.out.println("线程"
								+ Thread.currentThread().getName()
								+ "即将到达集合地点1，当前已有"
								+ (cb.getNumberWaiting() + 1)
								+ "个已经到达，"
								+ (cb.getNumberWaiting() == 2 ? "都到齐了，继续走啊"
										: "正在等候")); // 3个到齐 执行下一步；
						cb.await();
						Thread.sleep((long) (Math.random() * 10000));
						System.out.println("线程"
								+ Thread.currentThread().getName()
								+ "即将到达集合地点2，当前已有"
								+ (cb.getNumberWaiting() + 1)
								+ "个已经到达，"
								+ (cb.getNumberWaiting() == 2 ? "都到齐了，继续走啊"
										: "正在等候"));
						cb.await();
						Thread.sleep((long) (Math.random() * 10000));
						System.out.println("线程"
								+ Thread.currentThread().getName()
								+ "即将到达集合地点3，当前已有"
								+ (cb.getNumberWaiting() + 1)
								+ "个已经到达，"
								+ (cb.getNumberWaiting() == 2 ? "都到齐了，继续走啊"
										: "正在等候"));
						cb.await();
					} catch (Exception e) {
						e.printStackTrace();
					}
				}
			};
			service.execute(runnable);
		}
		service.shutdown();
	}
}
